Woman-Running-Tank-Top-Sports-Watch-Fitness-ExerciseExercise is invaluable when it comes to maintaining a healthy body composition. But a new study out of South Korea has found that both physical activity and vitamin D supplementation combined can do wonders for reducing abdominal fat, normalizing lipid counts and improving insulin resistance, particularly in type 2 diabetics. Researchers from Kyung Hee University in Gyeonggi-do randomly assigned 52 elderly women with type 2 diabetes (T2D) to one of four groups: one that supplemented with 1,200 international units (IU) of vitamin D daily, one that joined a circuit training group, one that supplemented with the vitamin D and joined the circuit training group, and another that did nothing but live their normal lives. The circuit training program was carefully designed to improve both the muscle strength and muscle endurance of the participants. It involved performing a series of respective exercises sequentially, and regularly throughout the three-month period. At both the beginning and end of the study, researchers measured a variety of health markers including abdominal fat, lipid count, vitamin D status, and fasting insulin and glucose levels, which are markers of insulin resistance. These measures were compared across all four groups to look for similarities and variances. More